JP2018199502A - Inner plug member for flexible container and flexible container - Google Patents

Abstract

To provide an inner plug member for a flexible container, capable of preventing the leakage of a fluid and discharging a minute amount of the fluid highly accurately.SOLUTION: An inner plug member 1 is attached to a neck 12 of a flexible container 10. A valve body 3, which is magnetically drawn, is stored in a cylindrical hollow part 25 of an inner plug 2. Permanent magnets 5 are arranged below a valve seat 41. In the inner plug, a discharge port 21, which is included in a cross-section shape of the hollow part, is opened at a top surface 27 on an upper end side. A plane shape of the valve body includes an open shape of the discharge port and is included in the cross-section shape of the hollow part of the inner plug. A flow channel 44 is formed which is opened downwardly from the inside of a recess 43 formed on an upper surface of the valve seat through an area 51 where the permanent magnets are disposed. The valve body is brought into contact with a peripheral edge of the recess in a closed valve state, and a gap 46 is formed between an upper surface of the recess and the valve body. The valve body is absorbed toward the valve seat constantly, and is opened by a pressure having a prescribed or higher value so that the valve body becomes movable between a position when the valve body is closed and a position when the valve body is brought into contact with a peripheral edge of the discharge port.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an inner plug member for a flexible container and a flexible container.

  There is a flexible container as a container for storing a fluid such as liquid or paste as contents. The flexible container is provided with a cap or the like continuously attached to the container main body in which the fluid is accommodated, and a neck that opens a fluid outlet. Examples of the flexible container include an extruded container for storing a paste-like seasoning such as mayonnaise, a tube container for storing toothpaste, and a squeeze bottle used for a water bottle for hydration during exercise.

  In a flexible container, when taking out the fluid stored in the container body, the container body is deformed by pressing the container body with a human hand or the like. As a result, the pressure in the container body rises and the fluid is discharged from the opening at the tip of the neck. And in a flexible container, the discharge amount of a fluid is adjusted by adjusting the pressing force to a container main body. The following Patent Document 1 describes a valve using the magnetic force of a permanent magnet in relation to the present invention.

JP-A-2005-9506

  A flexible container for storing a fluid as contents usually includes a cap for preventing leakage or volatilization of the fluid during storage. However, a flexible container such as a tube container cannot be maintained in an upright state in which the fluid outlet is directed vertically upward. Therefore, when the fluid is a low-viscosity liquid or the like, the fluid leaks when the container is tilted or the top-and-bottom is reversed in the opened state. Even if it is a bottle-shaped container with a bottom, if it falls down in the opened state, the fluid will spill.

  Therefore, it is not a valve that needs power to open the valve such as an electromagnetic valve, but a valve using the magnetic force of a permanent magnet as described in Patent Document 1 is used as an inner plug at the neck of the flexible container. It can be considered to be built in. The valve described in Patent Document 1 is a check valve, which includes a spherical valve body, and a spherical valve body is interposed on the upstream side of a flow path of a fluid such as gas or liquid. The valve has a valve seat at the outlet edge on the upstream side of the flow path, and is brought into a closed state by being in close contact with the valve seat. Further, when pressure exceeding the threshold value is applied to the valve body from the upstream side to the downstream side of the flow path, the valve body is opened against the attractive force due to the magnetic force of the permanent magnet. That is, in the conventional valve, the valve body quickly shifts to the valve open state by the pressure of the fluid from the valve closed state in which the valve body is in close contact with the upstream outlet of the flow path.

  However, in a flexible container that presupposes that the pressure is adjusted by pressing the container body with a human finger, the fluid is discharged all at once when the pressure exceeds the threshold value due to this responsive valve operation. Will be. Moreover, since the container main body is pressed by human fingers, the pressure in the container main body varies. Therefore, there is a problem that it is difficult to accurately discharge a predetermined amount of fluid. In particular, it is difficult to discharge a small amount of fluid.

  Therefore, the present invention provides a flexible mechanism equipped with a valve mechanism that can reliably prevent leakage of the fluid as the contents even when the container is turned over in the open state, and can discharge a small amount of fluid with high accuracy. It is an object to provide an inner plug member for a conductive container and a flexible container including the inner plug member.

One aspect of the present invention for achieving the above object is that a container body, which is formed of a flexible material and contains a fluid therein, has a hollow cylindrical shape with the vertical direction as an axis and has an opening at the upper end. Is an inner plug member for a flexible container,
Mounted on the inside of the neck,
A cylindrical inner plug having a hollow portion with the vertical axis as an inner axis;
A valve body made of a material that is accommodated in the hollow portion of the inner plug so as to be movable in the vertical direction and can be adsorbed by magnetic force,
A valve seat that supports the valve body in a closed state;
A permanent magnet disposed below the valve seat;
With
The hollow portion of the inner plug maintains a shape of a cross section orthogonal to the axis and opens downward, and the discharge port of the fluid opens on the top surface on the upper end side, and the opening shape of the discharge port has the opening shape. Included in the shape of the cross section,
The planar shape of the valve body when viewed from above includes the opening shape of the discharge port, and is included in the shape of the cross section of the hollow portion,
The valve seat includes a concave portion having a peripheral edge in a shape along a planar shape of the valve body on an upper surface,
A tubular flow path is formed which has an opening inside the recess and extends downward, and opens downward via a region where the permanent magnet is disposed,
In the valve-closed state, a gap is formed between the valve body and the upper surface of the recess while the valve body is in contact with the periphery of the recess.
The valve body is always attracted toward the valve seat by the permanent magnet, and the lower surface of the valve body has a suction force between the valve body and the valve seat by the fluid in the container. When a pressure greater than a predetermined value is applied, the valve is opened, and when the pressure is less than the predetermined value, the valve is closed.
In the valve open state, the valve body is movable from a position in the valve closed state to a position when it contacts the inner peripheral edge of the discharge port.
This is an inner plug member for a flexible container.

The inner plug has a cylindrical hollow portion with the vertical direction as an axis inside,
The valve body is spherical,
The permanent magnet is disposed along a ring coaxial with the axis of the inner plug,
The hollow portion of the inner plug is opened downward while maintaining the inner diameter, and the top surface on the upper end side is opened as a discharge port of the fluid with a diameter smaller than the inner diameter of the hollow portion,
The diameter of the valve body is larger than the opening diameter of the discharge port, smaller than the inner diameter of the hollow portion,
The valve seat includes a recess having a circular periphery on the upper surface,
The annular flow path has an opening at the center of the recess and extends downward, and opens downward via the hollow portion of the ring where the permanent magnet is disposed,
In the valve-closed state, the valve body abuts concentrically with the circular peripheral edge of the recess, and a gap is formed between the valve body and the upper surface of the recess.
It is preferable to use an inner plug member for a flexible container.

  Further, a hollow cylindrical shaft portion that opens downward while being inserted into the hollow portion of the permanent magnet is connected to the lower surface of the valve seat, and the opening at the center of the concave portion is connected to the hollow portion of the shaft portion. In addition, an inner plug member for a flexible container can be provided in which the flow path is formed.

  The permanent magnet may be an inner plug member for a flexible container, which is disposed below the valve seat in a sealed state.

In the scope of the present invention, a flexible body is formed by connecting a neck portion having an opening at the upper end in a hollow cylindrical shape with an axis in the vertical direction to a container body formed of a flexible material and containing a fluid therein. A flexible container is also included, and one aspect of the flexible container according to the present invention is:
An inner plug member is attached to the inside of the neck,
The inner plug member is a cylindrical inner plug having a hollow portion with the vertical direction as an axis inside,
A valve body made of a material that can be moved in the vertical direction in the hollow portion of the inner plug and can be adsorbed by magnetic force, a valve seat that supports the valve body in a closed state, and a valve seat that is disposed below the valve seat. And a permanent magnet
The hollow portion of the inner plug maintains a shape of a cross section orthogonal to the axis and opens downward, and the discharge port of the fluid opens on the top surface on the upper end side, and the opening shape of the discharge port has the opening shape. Included in the shape of the cross section,
The planar shape of the valve body when viewed from above includes the opening shape of the discharge port, and is included in the shape of the cross section of the hollow portion,
The valve seat includes a concave portion having a peripheral edge in a shape along a planar shape of the valve body on an upper surface,
A tubular flow path is formed which has an opening inside the recess and extends downward, and opens downward via a region where the permanent magnet is disposed,
In the valve-closed state, a gap is formed between the valve body and the upper surface of the recess while the valve body is in contact with the periphery of the recess.
The valve body is always attracted toward the valve seat by the permanent magnet, and the lower surface of the valve body has a suction force between the valve body and the valve seat by the fluid in the container. When a pressure greater than a predetermined value is applied, the valve is opened, and when the pressure is less than the predetermined value, the valve is closed.
In the valve open state, the valve body is movable from a position in the valve closed state to a position when it contacts the inner peripheral edge of the discharge port.
This is a flexible container.

The flexible container is
The inner plug has a cylindrical hollow portion with the vertical direction as an axis inside,
The valve body is spherical,
The permanent magnet is disposed along a ring coaxial with the axis of the inner plug,
The hollow portion of the inner plug is opened downward while maintaining the inner diameter, and the top surface on the upper end side is opened as a discharge port of the fluid with a diameter smaller than the inner diameter of the hollow portion,
The diameter of the valve body is larger than the opening diameter of the discharge port, smaller than the inner diameter of the hollow portion,
The valve seat includes a recess having a circular periphery on the upper surface,
The annular flow path has an opening at the center of the recess and extends downward, and opens downward via the hollow portion of the ring where the permanent magnet is disposed,
In the valve-closed state, the valve body abuts concentrically with the circular peripheral edge of the recess, and a gap is formed between the valve body and the upper surface of the recess.
It can also be set as the flexible container characterized by this.

  According to the inner plug member for a flexible container and the flexible container according to the present invention, it is possible to prevent leakage of the fluid as the contents even when the container in the opened state is turned over, and a small amount of the fluid Can be taken out with high accuracy. Other effects will be clarified in the following description.

It is a figure which shows the outline of the inner stopper member for flexible containers which concerns on the Example of this invention. It is a figure which shows the structure of the inner stopper member for flexible containers which concerns on the said Example. It is a figure which shows operation | movement of the inside stopper member for flexible containers which concerns on the said Example. It is a figure which shows the modification of the valve body support member which comprises the inside stopper member for flexible containers which concerns on the said Example. It is a figure which shows an example of the flexible container with which the inside stopper member for flexible containers provided with the valve body support member which concerns on the said modification was mounted | worn. It is a figure which shows an example of the flexible container with which the inside stopper member for flexible containers which concerns on the other Example of this invention was mounted | worn. It is a figure which shows the modification of the permanent magnet which comprises the inside stopper member for flexible containers which concerns on the said Example. It is a figure which shows the fixation structure of the inner stopper member for flexible containers which concerns on the other Example of this invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. Note that in the drawings used for the following description, the same or similar parts may be denoted by the same reference numerals and redundant description may be omitted. In some drawings, unnecessary symbols may be omitted in the description.

=== Example ===
As an inner plug member for a flexible container according to an embodiment of the present invention, it is attached to the neck of a tube container in which a fluid made of a cosmetic (skin lotion, cosmetic liquid, cosmetic oil, cosmetic liquid, etc.) is stored, An internal stopper member that also functions as a check valve will be listed. In FIG. 1, the tube container 10 provided with the inner stopper member 1 which concerns on a present Example was shown. 1A is an external view of the tube container 10 in a state where the inner plug member 1 is not mounted, and FIG. 1B is an external view of the tube container 10 in which the inner plug member 1 is mounted. is there. FIG. 1C shows an exploded view of the inner plug member 1 mounted on the neck 12 of the flexible container 10 for each part.

  As shown in FIG. 1A, in the tube container 10, the container main body 11 that stores the fluid is formed of a thin resin material that is easily deformed by fingers. For example, it is formed of a resin material having a single layer structure made of polyethylene (PE) or the like, or a multilayer structure in which PE is coated with a resin such as ethylene-vinyl alcohol polymer (EVOH). Alternatively, a material having a metal layer such as aluminum may be used. In addition, if the tube container 10 is for cosmetics, resin materials, such as PE, polypropylene (PP), and PET, can be considered. A male screw 13 is formed around the hollow cylindrical neck portion 12 connected to the container body 11, and a cap (not shown) is detachably attached to the neck portion 12.

  The opening 14 at the tip of the neck 12 is an original fluid discharge port in the flexible container 10, and communicates with the inside of the container body 11 through the hollow portion of the neck 12. In addition, the container main body 11 and the neck part 12 may be integrally molded, or may be individually molded parts. The illustrated tube container 10 includes a container body 11 and a molded portion in which a neck portion 12 and a shoulder portion 15 are integrated. In addition, although the molding part which consists of the neck part 12 and the shoulder part 15 is thick with respect to the container main body 11, the raw material itself can be comprised with the resin material similar to the container main body 11. FIG.

  As a manufacturing procedure of the tube container 10, for example, a hollow cylindrical sleeve that finally becomes the container main body 11 is formed by extrusion molding or sheet lamination, and an integrally molded product including a shoulder portion and a neck portion at one end of the sleeve. By integrally molding 15, the integrally molded product 15 and the sleeve are integrated. Then, the contents are filled from the other end of the sleeve, and the other end is sealed by a method such as welding or adhesion to complete the tube container 10 filled with the contents. Of course, the tube body 10 may be manufactured by joining the container body 11 and the integrally molded part of the neck 12 and the shoulder 15 by a method such as ultrasonic welding or adhesion.

  As shown in FIG. 1B, the inner plug member 1 according to the present embodiment is configured to include the inner plug 2 that is attached to the opening 14 of the neck 12, and specifically, FIG. As shown in FIG. 1, the valve body support member 4 and the annular permanent magnet 5 which are integrally provided with the inner plug 2, the spherical valve body 3, the valve seat 41 which supports the valve body 3 in the closed state are provided. Has been. The inner plug 2 and the valve body support member 4 are integrally molded products made of resin. For example, the inner plug 2 can be a molded product made of PE, PP, silicone, or the like. In addition, the valve body 3 is formed of a stainless steel bulb in consideration that the fluid is a skin lotion used for human skin. As is well known, stainless steel balls are used as stirring balls for cosmetic containers. In this embodiment, a stainless sphere made of SUS400 that can be attracted to a magnet is used.

  Here, the direction of the axis 100 of the hollow cylindrical neck 12 is the up-down direction, and the opening 14 of the tube container 10 is at the upper end of the neck 12, and the relative vertical directions in the tube container 10 and the inner plug member 1 are Stipulate. Further, in a state where the inner plug member 1 is attached to the neck portion 12, the members (2 to 5) constituting the inner plug member 1 are arranged coaxially with the neck portion 12. Hereinafter, apart from the relative vertical direction, the upward and downward directions based on gravity are referred to as vertically upward and vertically downward.

  When the relative vertical direction is defined as described above, the inner plug 2 is connected to a cylindrical body portion 23 having a diameter reduced with respect to the head portion 22 below the flat cylindrical head portion 22. In the hollow two-stage cylindrical shape, the fluid discharge port 21 in the inner plug member 1 is open at the center of the upper end of the head 22. The valve body support member 4 is formed by connecting a cylindrical shaft portion 42 below a disc-shaped valve seat 41 that supports the spherical valve body 3. On the upper surface of the valve seat 41, a concave portion 43 having a circular peripheral shape, a mortar shape, or a conical inner surface is formed, and a through hole 44 extending to the lower end of the shaft portion 42 is formed in the center of the concave portion 43. ing. An annular permanent magnet 5 is mounted on the shaft portion 42 of the valve body support member 4. The permanent magnet 5 can be a general magnet such as a ferrite magnet, but in this embodiment, a neodymium magnet having a strong magnetic force is used.

  When the inner plug member 1 according to the present embodiment is attached to the tube container 10, the lower end surface 24 of the head portion 22 of the inner plug 2 abuts on the upper end surface of the opening 14 of the neck portion 12, and Only the head portion 22 is exposed to the outside of the neck portion 12, and the body portion 23 of the inner plug 2 below the head portion 22, the valve body support member 4, and the permanent magnet 5 are inserted inside the neck portion 12. The spherical valve body 3 is accommodated in the hollow portion 25 of the inner plug 2.

  FIG. 2 shows the structure of the inner plug member 1 according to this embodiment. 2A is an external view of the inner plug member 1 in an assembled state, and FIG. 2B shows the inner plug member 1 in a state where the inner plug member 1 is attached to the neck portion 12 of the tube container 10 in the vertical direction. It is a longitudinal cross-sectional view when it cut | disconnects in the surface to include. As shown in FIG. 2A, the inner plug member 1 is in close contact with the disc-shaped valve seat 41 in the valve body support member 4 below the two-stage cylindrical inner plug 2 so as to be coaxial. Are stacked. In this example, the lower end surface of the body portion 23 in the inner plug 2 and the upper end surface of the valve seat 41 in the valve body support member 4 are joined by welding or adhesion. An annular permanent magnet 5 is mounted on the shaft portion 42 of the valve body support member 4 in a fitted state. A spherical valve element 3 is accommodated in the hollow portion 25 of the inner plug 2. In the illustrated inner plug member 1, annular projections (26, 45) are formed on the side surface of the body portion 23 of the cylindrical inner plug 2 and the disc-shaped valve seat 41.

  Next, a more specific configuration and structure of the inner plug member 1 according to the present embodiment will be described with reference to FIG. In FIG. 2 (B), the tube container 10 and each member (2-5) which comprises the inner plug member 1 are shown by different hatching. The outer diameter φD1 of the head portion 22 of the inner plug 2 is equal to the outer diameter φD2 of the neck portion 12 of the tube container 10, and the trunk portion having an outer diameter φD4 that is equal to or slightly larger than the inner diameter φD3 of the neck portion 12 below the head portion 22. 23 is connected. The valve seat 41 of the valve body support member 4 has the same outer diameter φD4 as the body portion 23. Therefore, the body part 23 of the inner plug 2 and the valve seat 41 of the valve body support member 4 are inserted in a state of being fitted to the neck part 12.

  A hollow cylindrical shaft portion 42 having a reduced diameter with respect to the valve seat 41 is formed below the valve seat 41 of the valve body support member 4. The outer diameter φD5 of the shaft portion 42 is equal to or slightly larger than the inner diameter of the hollow portion 51 of the annular permanent magnet 5. As a result, the permanent magnet 5 is mounted on the shaft portion 42 in a fitted state. In addition, the inner surface of the neck portion 12 of the tube container 10 is formed with concave portions 16 that circulate around the shaft 100 at two locations, upper and lower, and the concave portions 16 are formed on the side surfaces of the body portion 23 and the valve seat 41, respectively. By engaging with the projections (26, 45), the inner plug member 1 attached to the neck portion 12 is not easily detached. Of course, the inner plug member 1 may be attached to the neck portion 12 by welding or adhesion.

  As shown in FIG. 1C, a concave portion 43 having a circular periphery is formed on the upper surface of the valve seat 41, and the through hole 44 formed in the center of the concave portion 43 is a hollow portion of the shaft portion 42. And opens at the lower end of the shaft portion 42. A hole 18 that communicates with the inside of the container body 11 is formed at the center of the lower end surface 17 of the cylindrical inner surface of the neck portion 12. As a result, a tubular flow passage is formed which communicates from the lower end of the shaft portion 42 through the hollow portion 51 of the annular permanent magnet 5 to the center of the recess 43 formed on the upper surface of the valve seat 41. The fluid in 11 is guided into the inner plug member 1 through the flow path.

  A spherical valve body 3 is accommodated in the hollow portion 25 of the inner plug 2. The diameter φD7 of the valve body 3 is larger than the opening diameter φD8 of the discharge port 21 in the inner plug 2 and smaller than the inner diameter φD6 of the hollow portion 25 of the inner plug 2. Further, the inner plug member 1 is in a valve-closed state when the valve body 3 is concentrically in contact with the circular peripheral edge of the recess 43 of the valve seat 41. In the present embodiment, the valve body 3 is in contact with the inner surface of the recess 43. Of course, you may comprise so that the peripheral edge of the recessed part 43 may be contact | connected. In the closed state, the upper end position P <b> 1 of the valve body 3 is below the vertical position P <b> 2 of the top surface 27 in the hollow portion 25 of the inner plug 2. Therefore, as shown by the dotted circle in the figure, the valve body 3 has the position P3 when it contacts the inner peripheral edge of the discharge port 21 as the upper limit of the movement range, up to the upper limit position P3 and the position P1 in the valve-closed state. It is possible to move up and down within the range.

  The inner plug member 1 is closed when the valve body 3 abuts against the inner surface of the recess 43 by the attractive force from the permanent magnet 5, and the valve body 3 is discharged from the outlet by a force larger than the attractive force from the permanent magnet 5. When biased to the 21 side, the valve body 3 and the periphery of the recess 43 of the valve seat 41 are separated from each other, and the valve is opened. In the valve open state, since the inner diameter φD6 of the hollow portion 25 of the inner plug 2 is larger than the diameter φD7 of the valve body 3, a fluid discharge path from the container body 11 to the discharge port 21 of the inner plug 2 is formed. .

  By the way, the concave portion 43 in the valve seat 41 is formed so that a gap 46 is formed between the upper surface and the lower surface of the valve body 3 when the spherical valve body 3 comes into contact with the inner surface of the valve seat 41 to be closed. Has been. Further, the valve body 3 is always attracted downward by the magnetic force of the permanent magnet 5 and is attracted to the valve seat 41 by the magnetic force of the permanent magnet 5 unless a pressure of a predetermined value or more is applied upward from below. If the valve is kept closed and a pressure of a predetermined value or more is applied to the lower surface, the valve can move only within the distance between the positions P1 and P3 described above. In other words, the vertical position P2 of the top surface 27 of the hollow portion 25 and the opening diameter φD8 of the discharge port 21 are such that if the pressure applied to the valve body 3 from below to above is less than a predetermined value, the valve body 3 is in the valve seat 41. It is set so as to be in a closed state by adsorbing to the valve. In addition to the function as a stopper of the valve body 3 that prevents the valve body 3 from deviating, the inner plug 2 has a slight amount depending on the setting conditions for the vertical position P2 of the top surface 27 and the opening diameter φD8 of the discharge port 21. Part of the function for easily discharging the fluid.

=== Operation of Inner Plug Member ===
With the above-described configuration and structure, the inner plug member according to the present embodiment maintains a closed state unless an upward pressure of a predetermined value or more is applied to the valve body, and the valve is opened by applying a pressure of a predetermined value or more. Even in the state, if the pressure applied to the valve body becomes less than the predetermined value, the valve body is quickly restored to the closed state. Thereby, even if the tube container in the opened state is tilted, the fluid does not leak, and if a container body of the tube container is pressed, a very small amount of fluid is discharged accurately.

  FIG. 3 shows the operation of the inner plug member 1 according to the present embodiment. First, the tube container 10 is inverted or tilted so that the discharge port 21 of the inner plug 2 is inclined vertically downward or vertically downward, and the container body of the tube container 10 is pressed. Thereby, the fluid 6 flows into the inner plug member 1 side. At this time, since the gap 46 described above exists between the upper surface of the concave portion 43 of the valve seat 41 and the valve body 3, the valve body 3 is placed in the discharge port 21 until the fluid body 6 is filled in the gap 46. It is not biased toward (s1).

  When the pressure on the container body continues and a pressure of a predetermined value or more is applied to the valve body 3 by the fluid 6, the valve body 3 floats from the valve seat 41 against the attracting force by the permanent magnet 5. At this time, the fluid 6 stored in the gap 46 of the concave portion 43 is transmitted between the valve body 3 and the inner surface of the hollow portion 25 of the inner plug 2 and flows into the discharge port 21 side. 21 is discharged (s2). Even if the valve body 3 is separated from the valve seat 41, the valve body 3 moves to the valve seat 41 side by the attractive force from the permanent magnet 5 if the pressure applied to the valve body 3 from below is less than the predetermined value. Then, the inner plug member 1 is closed (s3). In addition, since the pressure applied to the valve body 3 is generated by the user pressing the container body of the tube container, the pressure is actually slightly released at the moment when the valve is opened. Therefore, the pressure applied to the valve body 3 instantaneously becomes less than a predetermined value, and the valve body 3 is attracted downward by the magnetic force of the permanent magnet to be closed.

  The discharge amount of the fluid 6 in this series of opening and closing operations of the inner plug member 1 is the amount stored in the gap 46 of the recess 43 at the start of the valve opening operation and the valve body 3 of the inner plug 2. This is an extremely small amount that is combined with the amount that flows into the inner plug 2 in a short time until the discharge path of the fluid is closed by contacting the inner peripheral edge of the discharge port 21. Further, when the container body is continuously pressed, the inner plug member 1 repeats the valve opening operation by the pressure of the fluid 6 and the valve closing operation by releasing the pressure accompanying the valve opening (s4). In this way, a small amount of fluid 6 is discharged.

  Even if the fluid 6 has the same viscosity, the difference between the diameter φD7 of the valve body 3 and the inner diameter φD6 of the hollow portion 25 of the inner plug 2 shown in FIG. By setting, it is possible to prevent the fluid 6 from being discharged from the discharge port 21 due to surface tension in a single valve opening and closing operation. In this case, when the weight of the fluid 6 accumulated on the discharge port 21 side in the process of continuously pressing the container body and continuously opening and closing the valve exceeds the surface tension, the fluid 6 Discharged. That is, in the inner plug member 1 according to the present embodiment, a minute amount and a predetermined amount of the fluid 6 can be dropped intermittently by appropriately setting the size of each part and the magnetic force of the permanent magnet.

  As described above, in the inner plug member 1 according to the present embodiment, a minute amount of the fluid 6 can be discharged with high accuracy without accurately adjusting the force pressing the container body of the flexible container. Further, by appropriately setting the dimensions (φD2 to φD8, etc.) of the respective parts (2 to 4) constituting the inner plug member 1 and the magnetic force of the permanent magnet 5 shown in FIG. It is also possible to control the discharge mode such as the discharge amount or the dropping.

  By the way, different fluids may be stored in flexible containers having the same shape. Alternatively, even when the same fluid is stored in a flexible container having the same shape, there are cases where it is desired to change the discharge mode (dropping, continuous discharge, etc.) depending on the use of the fluid. In such a case, in order to adjust the magnetic force of the permanent magnet 5 in addition to the size of each component, it is necessary to prepare various permanent magnets 5 having the same shape and different magnetic forces. However, the permanent magnet 5 is expensive among the components constituting the inner plug member 1, which causes a problem that the manufacturing cost increases. However, the inner plug member 1 of the present embodiment has a structure in which the annular permanent magnet 5 is disposed below the valve seat 41 of the valve body support member 4, and is formed on the lower surface of the valve seat 41 having a different thickness. The attractive force exerted on the valve body 3 can be adjusted by changing the distance in the vertical direction between the valve body 3 and the permanent magnet 5 in the closed state by placing the permanent magnet 5 in contact.

=== Other Embodiments ===
If the hollow portion of the inner plug in which the spherical valve body is accommodated is cylindrical, the outer shape of the inner plug member does not need to be cylindrical. The outer shape of the inner plug member may be any shape that engages with the inner surface shape of the neck. Further, the inner plug only needs to have a fluid discharge port formed at the upper end, and does not need to have a two-stage cylindrical shape. Therefore, the entire inner plug member may be inserted into the neck.

  The inner plug member may be configured to be detachable from the neck. That is, the inner plug member may be provided as a single unit separately from the flexible container. Thus, for example, if a plurality of inner plug members with different discharge states are prepared for a predetermined flexible container, the user can use an appropriate inner plug depending on the type of fluid and the use of the flexible container. A member can be selected and attached to the neck of the flexible container.

  In the above embodiment, the shaft portion of the valve seat is inserted into the hollow portion of the annular permanent magnet so that the fluid does not touch the permanent magnet, and a through hole serving as a flow path for the contents is formed in the shaft portion. It was. Of course, if there is no problem even if the fluid touches the surface of the permanent magnet, or if the fluid touches the surface of the permanent magnet, a chemical reaction will not occur, and a coating that does not easily wear or peel will be formed. If so, the valve body support member may be constituted only by the valve seat, and the hollow portion of the annular permanent magnet may be a part of the flow path of the fluid. On the contrary, the contact between the permanent magnet and the fluid may be prevented more reliably.

  Certainly, in the above embodiment, as shown in FIG. 2, the lower end surface 17 of the neck portion 12 became a partition, and the fluid in the container body 11 was difficult to directly touch the permanent magnet 5. The inner plug member itself may have a structure that can more reliably prevent contact between the permanent magnet and the fluid. FIG. 4 shows a valve body support member (104, 204) having a structure that can more reliably prevent contact between the permanent magnet 5 and the fluid. The valve body support member 104 shown as a longitudinal cross-sectional view in FIG. 4 (A) is formed by using a molding technique so that the upper end surface, the lower end surface, the outer peripheral side surface of the permanent magnet 5 and the entire inner surface of the hollow portion 51 are valve-shaped. The body support member 104 is covered with a resin.

  4B is an exploded perspective view, and the valve body support member 204 is substantially the same as the outer diameter of the upper member 4a similar to the valve body support member 4 and the annular permanent magnet 5 in the above embodiment. It is comprised with the flat bottomed cylindrical lower member 4b which has an internal diameter. An opening 242 having the same diameter as the through hole 44 is formed in the center of the bottom surface 241 of the lower member 4b. And the permanent magnet 5 is adhere | attached in the state which the lower surface periphery of the valve seat 41 in the upper member 4a and the upper surface periphery of the lower member 4b closely_contact | adhered in the state accommodated in the lower member 4b. Thereby, the entire surface of the permanent magnet 5 is covered by the valve body support member 204. Of course, the shaft portion 42 may not be formed on the lower surface of the valve seat 41 of the upper member 4a, and a hollow cylindrical portion corresponding to the shaft portion 42 may be formed at the center of the bottom surface 241 of the lower member 4b. In any case, if the permanent magnet 5 is sealed and disposed below the valve seat 41, contact between the permanent magnet 5 and the fluid 6 can be reliably prevented. FIG. 5 shows an inner plug member 1b including the valve body support member 204 shown in FIG. 4 (B). FIG. 5 shows a state where the inner plug member 1 b is attached to the neck portion 12 of the tube container 10.

  For reference, FIG. 6 shows an example of an inner plug member in the case where there is no lower end surface serving as a partition wall at the neck of the tube container and contact between the permanent magnet and the fluid does not matter. In the tube container 110 shown in FIG. 6, the cylindrical hollow portion in the neck portion 12 maintains a circular cross-sectional shape and communicates with the inside of the shoulder portion 15. Further, in the valve body support member 304 in the inner plug member 1c shown here, a hook-shaped protrusion 342 that supports the lower end surface of the permanent magnet 5 is provided at the lower end of the shaft portion 42 so that the permanent magnet 5 does not fall downward. Is formed.

  As long as the permanent magnet is arranged so as to attract the spherical valve element isotropically, the permanent magnet may not be an integral annular ring. For example, as shown in FIG. 7, a plurality of fan-shaped permanent magnets 105 may be arranged at equiangular intervals along the ring as viewed from the top and bottom.

  Of course, the inner plug member according to the embodiment of the present invention is not limited to the tube container but can be applied to flexible containers of various shapes such as bottles.

  In addition, the inner plug member according to the above-described embodiment has the lower end face (FIG. 2B, reference numeral 17) of the neck portion of the flexible container as a seat, while the body portion of the inner plug and the valve seat of the valve body support member. The portion was fitted on the neck of the flexible container by being fitted inside the neck. Of course, the structure for attaching the inner plug member to the neck of the flexible container can be changed as appropriate.

  FIG. 8 illustrates several mounting structures for the inner plug member. Here, the upper end sides of the inner plug members 1d to 1f that are mounted on the neck portion 12 are shown in an enlarged view. In the inner plug member 1d shown in FIG. 8A, the inner plug 102 is attached to the neck portion 12 by a structure called an “overhanging type” and the like, and the inner plug 102 has a fluid discharge port 21 on the upper end surface. However, it has a shape in which the flange 122 is formed on the upper end surface of the cylindrical body portion 123 instead of the two-stage cylindrical shape. The lower end surface of the flange 122 is supported by the upper end surface of the neck portion 12 of the flexible container 10, and the body portion 123 is fitted in the neck portion 12 inward.

  The inner plug member 1e shown in FIG. 8B is a “buried type” in which the entire inner plug 202 is fitted inward of the neck portion 12, and in this example, the upper end side of the neck portion 12 is formed thin and has a step. 112 is provided. A protrusion 222 is formed on the outer periphery of the upper end of the inner plug 202 to allow the step 112 to be a seat.

  The inner plug member 1 f shown in FIG. 8C is an “outer hook type” in which the inner plug 302 is mounted on the outer peripheral side of the upper end of the neck portion 12. In this outer-hanging type, the inner plug 302 is not in direct contact with the valve body support member 4, and each of the inner plug 302 and the valve body support portion 4 is attached to the neck portion 12 by an individual structure. That is, the inner plug member according to the embodiment of the present invention includes a non-integral type like the inner plug member 1f illustrated in FIG. The inner plug member 1g shown in FIG. 8D is formed in a double cylinder shape in which the inner plug 402 sandwiches the upper end side of the neck portion 12 from the inside and outside. It is attached to the neck 12 by a structure called "".

  In the above embodiment, the valve body has a spherical shape, and the valve seat supports the spherical valve body by a concave portion that opens circularly upward. However, if the valve closing state is realized when the valve body comes into contact with the valve seat by magnetic force, that is, the fluid discharge path from the inside of the container body to the outlet of the inner plug is closed. If possible, the shape of the valve body and the shape of supporting the valve body in the valve seat can be set as appropriate. Also, the permanent magnet may have an appropriate shape depending on the shape of the valve body or valve seat that supports the valve body.

  In any case, the inner plug has a hollow portion with the vertical axis as the axis, the valve body is made of a material that can be adsorbed by magnetic force, a permanent magnet is disposed below the valve seat, and the hollow portion of the inner plug is the shaft As long as the shape of the cross section orthogonal to the upper surface is maintained, the fluid discharge port is opened on the top surface on the upper end side, and the shape of the discharge port is included in the shape of the cross section. . The planar shape of the valve body when viewed from above includes the opening shape of the discharge port, and is included in the shape of the cross section of the hollow portion of the inner plug, and the valve seat follows the planar shape of the valve body on the upper surface. A recess having a peripheral edge in the shape, having an opening inside the recess, extending downward, and forming a tubular flow path that opens downward via a region where the permanent magnet is disposed, and is closed In the state, the valve body only needs to be configured such that a gap is formed between the valve body and the upper surface of the recess while abutting the periphery of the recess.

1,1b-1g Inner plug member, 2,102,202,302,402 Inner plug, 3 valve body,
4, 104, 204, 304 Valve body support member, 5,105 permanent magnet, 6 fluid,
10,110 tube container, 11 container body, 12 neck,
13 Discharge port of tube container, 21 Discharge port of fluid in inner plug member,
22 head part of the inner plug, 23 barrel part of the inner plug, 27 top surface of the hollow part in the inner plug,
41 Valve seat, 42 Shaft, 43 Recess,
44 through-hole (fluid flow path in the valve body support member),
P1 Upper position of the valve body in the closed state, P2 Vertical position of the top surface of the hollow portion in the inner plug,
P3 Upper limit position where valve body can move, φD6 inner diameter of hollow part of inner plug,
φD7 Diameter of valve body, φD8 Opening diameter of discharge port,

Claims (6)

An inner plug member for a flexible container, which is formed of a flexible material and is connected to a container body in which a fluid is housed in a hollow cylindrical shape having an axis in the vertical direction and having an opening at the upper end. Because
Mounted on the inside of the neck,
A cylindrical inner plug having a hollow portion with the vertical axis as an inner axis;
A valve body made of a material that is accommodated in the hollow portion of the inner plug so as to be movable in the vertical direction and can be adsorbed by magnetic force,
A valve seat that supports the valve body in a closed state;
A permanent magnet disposed below the valve seat;
With
The hollow portion of the inner plug maintains a shape of a cross section orthogonal to the axis and opens downward, and the discharge port of the fluid opens on the top surface on the upper end side, and the opening shape of the discharge port has the opening shape. Included in the shape of the cross section,
The planar shape of the valve body when viewed from above includes the opening shape of the discharge port, and is included in the shape of the cross section of the hollow portion,
The valve seat includes a concave portion having a peripheral edge in a shape along a planar shape of the valve body on an upper surface,
A tubular flow path is formed which has an opening inside the recess and extends downward, and opens downward via a region where the permanent magnet is disposed,
In the valve-closed state, a gap is formed between the valve body and the upper surface of the recess while the valve body is in contact with the periphery of the recess.
The valve body is always attracted toward the valve seat by the permanent magnet, and the lower surface of the valve body has a suction force between the valve body and the valve seat by the fluid in the container. When a pressure greater than a predetermined value is applied, the valve is opened, and when the pressure is less than the predetermined value, the valve is closed.
In the valve open state, the valve body is movable from a position in the valve closed state to a position when it contacts the inner peripheral edge of the discharge port.
An inner plug member for a flexible container. In claim 1,
The inner plug has a cylindrical hollow portion with the vertical direction as an axis inside,
The valve body is spherical,
The permanent magnet is disposed along a ring coaxial with the axis of the inner plug,
The hollow portion of the inner plug is opened downward while maintaining the inner diameter, and the top surface on the upper end side is opened as a discharge port of the fluid with a diameter smaller than the inner diameter of the hollow portion,
The diameter of the valve body is larger than the opening diameter of the discharge port, smaller than the inner diameter of the hollow portion,
The valve seat includes a recess having a circular periphery on the upper surface,
The annular flow path has an opening at the center of the recess and extends downward, and opens downward via the hollow portion of the ring where the permanent magnet is disposed,
In the valve-closed state, the valve body abuts concentrically with the circular peripheral edge of the recess, and a gap is formed between the valve body and the upper surface of the recess.
An inner plug member for a flexible container.   The hollow cylindrical shaft portion that opens downward while being inserted into the hollow portion of the permanent magnet is connected to the lower surface of the valve seat, and the opening at the center of the concave portion is the hollow portion of the shaft portion. An inner plug member for a flexible container, characterized in that the flow path is formed by being connected to a container.   4. The flexible container inner plug member according to claim 1, wherein the permanent magnet is disposed below the valve seat in a sealed state. A flexible container in which a neck portion having an opening at the upper end in a hollow cylindrical shape with an axis in the vertical direction is connected to a container body formed of a flexible material and containing a fluid therein,
An inner plug member is attached to the inside of the neck,
The inner plug member is a cylindrical inner plug having a hollow portion with the vertical direction as an axis inside,
A valve body made of a material that can be moved in the vertical direction in the hollow portion of the inner plug and can be adsorbed by magnetic force, a valve seat that supports the valve body in a closed state, and a valve seat that is disposed below the valve seat. And a permanent magnet
The hollow portion of the inner plug maintains a shape of a cross section orthogonal to the axis and opens downward, and the discharge port of the fluid opens on the top surface on the upper end side, and the opening shape of the discharge port has the opening shape. Included in the shape of the cross section,
The planar shape of the valve body when viewed from above includes the opening shape of the discharge port, and is included in the shape of the cross section of the hollow portion,
The valve seat includes a concave portion having a peripheral edge in a shape along a planar shape of the valve body on an upper surface,
A tubular flow path is formed which has an opening inside the recess and extends downward, and opens downward via a region where the permanent magnet is disposed,
In the valve-closed state, a gap is formed between the valve body and the upper surface of the recess while the valve body is in contact with the periphery of the recess.
The valve body is always attracted toward the valve seat by the permanent magnet, and the lower surface of the valve body has a suction force between the valve body and the valve seat by the fluid in the container. When a pressure greater than a predetermined value is applied, the valve is opened, and when the pressure is less than the predetermined value, the valve is closed.
In the valve open state, the valve body is movable from a position in the valve closed state to a position when it contacts the inner peripheral edge of the discharge port.
A flexible container characterized by the above. In claim 5,
The inner plug has a cylindrical hollow portion with the vertical direction as an axis inside,
The valve body is spherical,
The permanent magnet is disposed along a ring coaxial with the axis of the inner plug,
The hollow portion of the inner plug is opened downward while maintaining the inner diameter, and the top surface on the upper end side is opened as a discharge port of the fluid with a diameter smaller than the inner diameter of the hollow portion,
The diameter of the valve body is larger than the opening diameter of the discharge port, smaller than the inner diameter of the hollow portion,
The valve seat includes a recess having a circular periphery on the upper surface,
The annular flow path has an opening at the center of the recess and extends downward, and opens downward via the hollow portion of the ring where the permanent magnet is disposed,
In the valve-closed state, the valve body abuts concentrically with the circular peripheral edge of the recess, and a gap is formed between the valve body and the upper surface of the recess.
A flexible container characterized by the above.

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